Process of producing fertilizer and cattle feei



Patented June I y UNITED STATES anonrn woommn, .m, or normal, rumors.

Ho Drawing.

Thisinvention pertains to a method of recovering solids from the spent residue of slop of butyl alcohol distillation for yielding valuable ingredients for use in producing fertilizing material and cattle feed, including the recovery of alcohol.

An object of the invention is to obtain solids such as starches, sugar, proteins, fats and salts from the very thin spent slop resulting from he distillation of butyl alcohol from ains or other starch making vegetable atter by adding such slop to a A further object is that of salvaging an' otherwise discarded but valuable content of the slop ,resultin from the process ofdistillation of buty alcoholfrom starch substances and employin such slop for the reduction of the speci c gravity of a material of very high specific gravity serving as the reducing medium for the latter inorder that it may undergo treatment for its own solids and that it maybe distilled for-the recovery of alcohol, the combining of the two materials bein' directed to the recovery of the solids o the otherwise discarded sloB.

ue to the excessive quantitles-of water required in the treatment of materials used in the manufacture of butyl alcohol, which is somewhere in the proportion of from sixt to seventy gallons ofwater to a bushel of fty-six pounds of starch making materials, it is, of course, impractical to attemptthe recovery of the solids the residue or slop by ordinary known methods. The solids such as proteins, fats and salts which,

while valuable fornse in making fertilizers and feed cannot be recovered from the great bulk of liquid carrying them by'reason of the prohibitive cost of so doing and they are therefore permitted to run to waste.

In view of the value of the solids and also from the fact that the butyl alcohol slop can be used as a yeast food for the pioduction of alcohol from cane or beet molasses or other sugar containing materials it is my of alcohol.

rnocnss or rnonucme marrmznn nn carrnn :i'niin' Application filed December 26, 1924. Serial No. 768,816.

PATENT purpose to bring these "two materials together for the stated purpose ofcreating a fertilizer ora cattle feed-while recovering the alcohol from the mixture-during the process. a

In practicing my process I may use the residue or slop of butyl alcohol distillation in its original discarded state, or I may concentrate it to a certain extent, if I so desire, before combining the two materials.

The combined solutions are placed in a suitable container in about the proportion of ten gallons of the slop to one gallon of the molasses which, after thoroughagitation to obtain a proper admixture,is sterilized by known methods to destroy yeast cells, the resulting mashbein then cooled to converting temperature, a ding thereto a malt or diastase for conversion of the starches intofermentable sugar.

After conversion and at any time before fermentation-I preferably add to the mixture a suflicient amount of alkali to neutralize the acids in the butyl alcohol slop tion of the sugar, distillers yeast being add- 1 ed in suflicient quantity for the production After 'fermentation has taken place the mass is subjected to distillation in the customary way or ways to recover the alcohol.

ticed. By settling the slop in the usual way.

the thin liquor may be drawn oflf, or, by subjectin the whole to filter pressing in the well known way filter cakes are produced, while the thin liquor may be run into vacuum' pans for evaporation, the syrupy residue'of which is combined with the filter cakes followed by finishing in feed driers. The dried material contains all of the salts and nitrogenous matter of the original slop of butyl alcohol manufacture together with the salts and other valuable materials of the molasses and constitute in conjunction with the grains themselves a valuable concentrated fertilizing material.

As an alternative method, the heavy main a steam tight vessel and subjected to The residue or slop remaining after disthe filter presses.

' forth. T

,such as molasses is of a'very high'specific to recover the solids therein, the addition steam pressure of from five to ten pounds, for example, for the purpose of placing the same in better condition for treatment in The filter cakes may now be dried without the addition of other matter, but in eithertreatment all of the solids obtained are used with the exception of the starches, of course, of the original butyl alcohol'slop and which contain a high percentage of proteins and fats and contribute to a very excellent cattle feed. I

1 The steps incident to the recovery of the alcohol from the combined materials is quite naturally taken advantage of since yielding a valuable commodity and reducing the cost of'practicin the process of recovering the named soli s.

" Combining with a heavy substance such as the heavy molasses a distillers slop too thin to be treated-separately for its valuable solids is believed to be a new step in the art and particularly for the purposes set at is to say, since a substance gravity, as commercially supplied, and must be treated to reduce its gravity order thereto'of a thin slop resulting from butyl alcohol distillation, extremely low in gravagent provides the way for recovery of the valuable solids in,both.

I claim:

1. In the process of producing materials from which to obtain a fertilizer and a cattfzhedproduction of said fertilizer and cattleee r w tle feed the process of eombinin with the very thin slop of butyl alcohol 'stillation a sugar containing material of a relatively high s ecific gravit for raising the gravity of sai slop where y to produce a mixture from which valuable substances in the original slop may be economically obtained in 2. In the process of producing materials from which to obtain a dried fertilizer and cattle feed the process of combining with the naturally very thin slop of butyl alcohol Y distillation a sugar containing material of a much higher specific gravity than that of said slop whereby to provide a mixture of said slop capable of treatment economically in obtaining said fertilizer and cattle feed.

3. The rocess of producing a fertilizer and a catt e feed which includes the rocess of combining slop of butyl alcohol distillation having a naturally very low specific gravity with a sugar containing material of a high specific gravity for raising the gravity of the said slop and reducing the gravity of the said sugar containing material whereby to'produce a mixture from which valuable substances can be economiwcally obtained in the production of said feed, the process 0 thick portion and gravity a molasses of a very high specific gravit whereby to increase the gravity of said s op and decrease the gravity of the molasses to provide a mixture of a gravity capable of economical treatment in the production of said fertilizer and cattle feed.

5. In the process of producing a fertilizer and cattle feed, the process which includes combinin a low gravity waste slop of butyl alcohol istillation with a molasses of a high pecific gravity 1 for increasing the gravity of said S10 and decreasing that of the molasses where y to provide a mixture from which the solids of the original thin slop may be economically recovered.

6. In the process of producing a fertilizer and cattle feed, the process "which includes combinin a low gravity waste slop of butyl alcohol distillation with a molasses of high s cific gravity, separatin the thick and t in portions, and drying t e thick portion.

7. he rocess of producing a fertilizer and a catt e feed which includes combining waste slop of but 1 alcohol distillation with a molasses of hi specific gravity, separating the thick an thin portions, evaporating the thin portion and combining the residue of evaporation with the thick portion.

'8. T e process of producing a fertilizer and cattle feed which includes combining waste slop of butyl alcohol distillation with a/molasses of high ing the thick and thin portlons of the mixture, evaporatin the thin portion, combining the residue 0 evaporation with the thick portion, and drying the same.

9. In the process of recovering solids from the thin slop of butyl alcohol distillation a fertilizer and cattle combining the slop with a material of high specific gravity also cont-ainin solids, sterihzing the mixture, cooling, a ding a malt or diastase, yeasting, fermenting and distilling to recover alcohol, separating the thick and thin portions of the resultant slop, evaporating the thin portion, addingthe syrup of evaporation to the I drying the same.

10. In the process of recovering solids from the thin slop of butyl alcohol distillation for-use in making a fertilizer and cattle feed, the process of; combining the slop with amaterial of high specific gravity also containing solids for use in producing said fertilizer and cattle feed, sterilizing the mixture and cooling it, adding a malt or diastase, yeasting, fermenting and distillin for use in making to recover alcohol, separating the thick an thin portions of the resultant slop, subjectdryin the same.

Inn

11. the process of recovering solids 4 from the thin slop of butyl alcohol distillations for use in making a fertilizer and cattle feed, the process of combining the slop with a molasses of high specificgravity also containing solids for use in producing said fertilizer and cattle feed, sterilizing the mixture and cooling it, adding a malt or diastase, yeasting, fermenting and distilling the same'to recover the alcohol, and reducing the resultant slop to dr ness.

12. In the process 0 recovering valuable. substances from the slop of butyl alcohol distillation, the process of. combining. the slop with a material of high specific gravity containing recoverable substances, sterilizing the mixture, converting, cooling, yeastmg,

neutralizing, fermenting and distilling the same to recover alcohol therein,'andreduc- 'ing the resultant slop for drying. 2o

and a cattle eed, the process which includes 13. In the recess of producing a fertilizer the steps of adding the thin waste slop of butyl alcohol distillation to a material of a relativel higher specific gravityto produce a worka le mixture of both saidmaterials,

treating the mixture to produce fermentation, distilling the same to recover the alcohol, and drying. the residue.

14. In the process of producing a fertilizer and cattle feed, the process which includes the steps of combining the thin waste slop of butyl alcohol distillation with a molasses of a much higher specific gravity than said slop, sterilizing the mixture, cooling the same, adding yeast thereto, and distilling the same.

7 15. In the process of producing a fertilizer and cattle feed, the process which includes the steps of combining the thin waste slop of butyl alcohol distillation with a material of a very high specific gravity to produce a workable mixture for both materials, fermenting and distilling the same for the recovery of alcohol, separating the thick from 

